ˀənkab - from, starting from, from... on; with regard to, with respect to, in relation to (TED 1489)

Likely a combination of ˀən- (probably, the same element as in Geez ˀənbala, which may ultimately be identical to Akk. ina) *kV, not preserved in Tigrinya as an independent preposition, and ab ‘in’ (Arakelova 2001:18).